sound/pci/lx6464es/lx6464es.c

   1 /* -*- linux-c -*- *
   2  *
   3  * ALSA driver for the digigram lx6464es interface
   4  *
   5  * Copyright (c) 2008, 2009 Tim Blechmann <tim@klingt.org>
   6  *
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/pci.h>
  28 #include <linux/delay.h>
  29 #include <linux/slab.h>
  30
  31 #include <sound/initval.h>
  32 #include <sound/control.h>
  33 #include <sound/info.h>
  34
  35 #include "lx6464es.h"
  36
  37 MODULE_AUTHOR("Tim Blechmann");
  38 MODULE_LICENSE("GPL");
  39 MODULE_DESCRIPTION("digigram lx6464es");
  40 MODULE_SUPPORTED_DEVICE("{digigram lx6464es{}}");
  41
  42
  43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  45 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  46
  47 module_param_array(index, int, NULL, 0444);
  48 MODULE_PARM_DESC(index, "Index value for Digigram LX6464ES interface.");
  49 module_param_array(id, charp, NULL, 0444);
  50 MODULE_PARM_DESC(id, "ID string for  Digigram LX6464ES interface.");
  51 module_param_array(enable, bool, NULL, 0444);
  52 MODULE_PARM_DESC(enable, "Enable/disable specific Digigram LX6464ES soundcards.");
  53
  54 static const char card_name[] = "LX6464ES";
  55
  56
  57 #define PCI_DEVICE_ID_PLX_LX6464ES              PCI_DEVICE_ID_PLX_9056
  58
  59 static const struct pci_device_id snd_lx6464es_ids[] = {
  60         { PCI_DEVICE_SUB(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES,
  61                          PCI_VENDOR_ID_DIGIGRAM,
  62                          PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_SERIAL_SUBSYSTEM),
  63         },                      /* LX6464ES */
  64         { PCI_DEVICE_SUB(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES,
  65                          PCI_VENDOR_ID_DIGIGRAM,
  66                          PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_CAE_SERIAL_SUBSYSTEM),
  67         },                      /* LX6464ES-CAE */
  68         { 0, },
  69 };
  70
  71 MODULE_DEVICE_TABLE(pci, snd_lx6464es_ids);
  72
  73
  74
  75 /* PGO pour USERo dans le registre pci_0x06/loc_0xEC */
  76 #define CHIPSC_RESET_XILINX (1L<<16)
  77
  78
  79 /* alsa callbacks */
  80 static const struct snd_pcm_hardware lx_caps = {
  81         .info             = (SNDRV_PCM_INFO_MMAP |
  82                              SNDRV_PCM_INFO_INTERLEAVED |
  83                              SNDRV_PCM_INFO_MMAP_VALID |
  84                              SNDRV_PCM_INFO_SYNC_START),
  85         .formats          = (SNDRV_PCM_FMTBIT_S16_LE |
  86                              SNDRV_PCM_FMTBIT_S16_BE |
  87                              SNDRV_PCM_FMTBIT_S24_3LE |
  88                              SNDRV_PCM_FMTBIT_S24_3BE),
  89         .rates            = (SNDRV_PCM_RATE_CONTINUOUS |
  90                              SNDRV_PCM_RATE_8000_192000),
  91         .rate_min         = 8000,
  92         .rate_max         = 192000,
  93         .channels_min     = 2,
  94         .channels_max     = 64,
  95         .buffer_bytes_max = 64*2*3*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER,
  96         .period_bytes_min = (2*2*MICROBLAZE_IBL_MIN*2),
  97         .period_bytes_max = (4*64*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER),
  98         .periods_min      = 2,
  99         .periods_max      = MAX_STREAM_BUFFER,
 100 };
 101
 102 static int lx_set_granularity(struct lx6464es *chip, u32 gran);
 103
 104
 105 static int lx_hardware_open(struct lx6464es *chip,
 106                             struct snd_pcm_substream *substream)
 107 {
 108         int err = 0;
 109         struct snd_pcm_runtime *runtime = substream->runtime;
 110         int channels = runtime->channels;
 111         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 112
 113         snd_pcm_uframes_t period_size = runtime->period_size;
 114
 115         dev_dbg(chip->card->dev, "allocating pipe for %d channels\n", channels);
 116         err = lx_pipe_allocate(chip, 0, is_capture, channels);
 117         if (err < 0) {
 118                 dev_err(chip->card->dev, LXP "allocating pipe failed\n");
 119                 return err;
 120         }
 121
 122         err = lx_set_granularity(chip, period_size);
 123         if (err < 0) {
 124                 dev_err(chip->card->dev, "setting granularity to %ld failed\n",
 125                            period_size);
 126                 return err;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static int lx_hardware_start(struct lx6464es *chip,
 133                              struct snd_pcm_substream *substream)
 134 {
 135         int err = 0;
 136         struct snd_pcm_runtime *runtime = substream->runtime;
 137         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 138
 139         dev_dbg(chip->card->dev, "setting stream format\n");
 140         err = lx_stream_set_format(chip, runtime, 0, is_capture);
 141         if (err < 0) {
 142                 dev_err(chip->card->dev, "setting stream format failed\n");
 143                 return err;
 144         }
 145
 146         dev_dbg(chip->card->dev, "starting pipe\n");
 147         err = lx_pipe_start(chip, 0, is_capture);
 148         if (err < 0) {
 149                 dev_err(chip->card->dev, "starting pipe failed\n");
 150                 return err;
 151         }
 152
 153         dev_dbg(chip->card->dev, "waiting for pipe to start\n");
 154         err = lx_pipe_wait_for_start(chip, 0, is_capture);
 155         if (err < 0) {
 156                 dev_err(chip->card->dev, "waiting for pipe failed\n");
 157                 return err;
 158         }
 159
 160         return err;
 161 }
 162
 163
 164 static int lx_hardware_stop(struct lx6464es *chip,
 165                             struct snd_pcm_substream *substream)
 166 {
 167         int err = 0;
 168         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 169
 170         dev_dbg(chip->card->dev, "pausing pipe\n");
 171         err = lx_pipe_pause(chip, 0, is_capture);
 172         if (err < 0) {
 173                 dev_err(chip->card->dev, "pausing pipe failed\n");
 174                 return err;
 175         }
 176
 177         dev_dbg(chip->card->dev, "waiting for pipe to become idle\n");
 178         err = lx_pipe_wait_for_idle(chip, 0, is_capture);
 179         if (err < 0) {
 180                 dev_err(chip->card->dev, "waiting for pipe failed\n");
 181                 return err;
 182         }
 183
 184         dev_dbg(chip->card->dev, "stopping pipe\n");
 185         err = lx_pipe_stop(chip, 0, is_capture);
 186         if (err < 0) {
 187                 dev_err(chip->card->dev, "stopping pipe failed\n");
 188                 return err;
 189         }
 190
 191         return err;
 192 }
 193
 194
 195 static int lx_hardware_close(struct lx6464es *chip,
 196                              struct snd_pcm_substream *substream)
 197 {
 198         int err = 0;
 199         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 200
 201         dev_dbg(chip->card->dev, "releasing pipe\n");
 202         err = lx_pipe_release(chip, 0, is_capture);
 203         if (err < 0) {
 204                 dev_err(chip->card->dev, "releasing pipe failed\n");
 205                 return err;
 206         }
 207
 208         return err;
 209 }
 210
 211
 212 static int lx_pcm_open(struct snd_pcm_substream *substream)
 213 {
 214         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 215         struct snd_pcm_runtime *runtime = substream->runtime;
 216         int err = 0;
 217         int board_rate;
 218
 219         dev_dbg(chip->card->dev, "->lx_pcm_open\n");
 220         mutex_lock(&chip->setup_mutex);
 221
 222         /* copy the struct snd_pcm_hardware struct */
 223         runtime->hw = lx_caps;
 224
 225 #if 0
 226         /* buffer-size should better be multiple of period-size */
 227         err = snd_pcm_hw_constraint_integer(runtime,
 228                                             SNDRV_PCM_HW_PARAM_PERIODS);
 229         if (err < 0) {
 230                 dev_warn(chip->card->dev, "could not constrain periods\n");
 231                 goto exit;
 232         }
 233 #endif
 234
 235         /* the clock rate cannot be changed */
 236         board_rate = chip->board_sample_rate;
 237         err = snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_RATE,
 238                                            board_rate);
 239
 240         if (err < 0) {
 241                 dev_warn(chip->card->dev, "could not constrain periods\n");
 242                 goto exit;
 243         }
 244
 245         /* constrain period size */
 246         err = snd_pcm_hw_constraint_minmax(runtime,
 247                                            SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 248                                            MICROBLAZE_IBL_MIN,
 249                                            MICROBLAZE_IBL_MAX);
 250         if (err < 0) {
 251                 dev_warn(chip->card->dev,
 252                            "could not constrain period size\n");
 253                 goto exit;
 254         }
 255
 256         snd_pcm_hw_constraint_step(runtime, 0,
 257                                    SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 32);
 258
 259         snd_pcm_set_sync(substream);
 260         err = 0;
 261
 262 exit:
 263         runtime->private_data = chip;
 264
 265         mutex_unlock(&chip->setup_mutex);
 266         dev_dbg(chip->card->dev, "<-lx_pcm_open, %d\n", err);
 267         return err;
 268 }
 269
 270 static int lx_pcm_close(struct snd_pcm_substream *substream)
 271 {
 272         int err = 0;
 273         dev_dbg(substream->pcm->card->dev, "->lx_pcm_close\n");
 274         return err;
 275 }
 276
 277 static snd_pcm_uframes_t lx_pcm_stream_pointer(struct snd_pcm_substream
 278                                                *substream)
 279 {
 280         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 281         snd_pcm_uframes_t pos;
 282         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 283
 284         struct lx_stream *lx_stream = is_capture ? &chip->capture_stream :
 285                 &chip->playback_stream;
 286
 287         dev_dbg(chip->card->dev, "->lx_pcm_stream_pointer\n");
 288
 289         mutex_lock(&chip->lock);
 290         pos = lx_stream->frame_pos * substream->runtime->period_size;
 291         mutex_unlock(&chip->lock);
 292
 293         dev_dbg(chip->card->dev, "stream_pointer at %ld\n", pos);
 294         return pos;
 295 }
 296
 297 static int lx_pcm_prepare(struct snd_pcm_substream *substream)
 298 {
 299         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 300         int err = 0;
 301         const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 302
 303         dev_dbg(chip->card->dev, "->lx_pcm_prepare\n");
 304
 305         mutex_lock(&chip->setup_mutex);
 306
 307         if (chip->hardware_running[is_capture]) {
 308                 err = lx_hardware_stop(chip, substream);
 309                 if (err < 0) {
 310                         dev_err(chip->card->dev, "failed to stop hardware. "
 311                                    "Error code %d\n", err);
 312                         goto exit;
 313                 }
 314
 315                 err = lx_hardware_close(chip, substream);
 316                 if (err < 0) {
 317                         dev_err(chip->card->dev, "failed to close hardware. "
 318                                    "Error code %d\n", err);
 319                         goto exit;
 320                 }
 321         }
 322
 323         dev_dbg(chip->card->dev, "opening hardware\n");
 324         err = lx_hardware_open(chip, substream);
 325         if (err < 0) {
 326                 dev_err(chip->card->dev, "failed to open hardware. "
 327                            "Error code %d\n", err);
 328                 goto exit;
 329         }
 330
 331         err = lx_hardware_start(chip, substream);
 332         if (err < 0) {
 333                 dev_err(chip->card->dev, "failed to start hardware. "
 334                            "Error code %d\n", err);
 335                 goto exit;
 336         }
 337
 338         chip->hardware_running[is_capture] = 1;
 339
 340         if (chip->board_sample_rate != substream->runtime->rate) {
 341                 if (!err)
 342                         chip->board_sample_rate = substream->runtime->rate;
 343         }
 344
 345 exit:
 346         mutex_unlock(&chip->setup_mutex);
 347         return err;
 348 }
 349
 350 static int lx_pcm_hw_params(struct snd_pcm_substream *substream,
 351                             struct snd_pcm_hw_params *hw_params, int is_capture)
 352 {
 353         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 354         int err = 0;
 355
 356         dev_dbg(chip->card->dev, "->lx_pcm_hw_params\n");
 357
 358         mutex_lock(&chip->setup_mutex);
 359
 360         /* set dma buffer */
 361         err = snd_pcm_lib_malloc_pages(substream,
 362                                        params_buffer_bytes(hw_params));
 363
 364         if (is_capture)
 365                 chip->capture_stream.stream = substream;
 366         else
 367                 chip->playback_stream.stream = substream;
 368
 369         mutex_unlock(&chip->setup_mutex);
 370         return err;
 371 }
 372
 373 static int lx_pcm_hw_params_playback(struct snd_pcm_substream *substream,
 374                                  struct snd_pcm_hw_params *hw_params)
 375 {
 376         return lx_pcm_hw_params(substream, hw_params, 0);
 377 }
 378
 379 static int lx_pcm_hw_params_capture(struct snd_pcm_substream *substream,
 380                                  struct snd_pcm_hw_params *hw_params)
 381 {
 382         return lx_pcm_hw_params(substream, hw_params, 1);
 383 }
 384
 385 static int lx_pcm_hw_free(struct snd_pcm_substream *substream)
 386 {
 387         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 388         int err = 0;
 389         int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 390
 391         dev_dbg(chip->card->dev, "->lx_pcm_hw_free\n");
 392         mutex_lock(&chip->setup_mutex);
 393
 394         if (chip->hardware_running[is_capture]) {
 395                 err = lx_hardware_stop(chip, substream);
 396                 if (err < 0) {
 397                         dev_err(chip->card->dev, "failed to stop hardware. "
 398                                    "Error code %d\n", err);
 399                         goto exit;
 400                 }
 401
 402                 err = lx_hardware_close(chip, substream);
 403                 if (err < 0) {
 404                         dev_err(chip->card->dev, "failed to close hardware. "
 405                                    "Error code %d\n", err);
 406                         goto exit;
 407                 }
 408
 409                 chip->hardware_running[is_capture] = 0;
 410         }
 411
 412         err = snd_pcm_lib_free_pages(substream);
 413
 414         if (is_capture)
 415                 chip->capture_stream.stream = NULL;
 416         else
 417                 chip->playback_stream.stream = NULL;
 418
 419 exit:
 420         mutex_unlock(&chip->setup_mutex);
 421         return err;
 422 }
 423
 424 static void lx_trigger_start(struct lx6464es *chip, struct lx_stream *lx_stream)
 425 {
 426         struct snd_pcm_substream *substream = lx_stream->stream;
 427         const unsigned int is_capture = lx_stream->is_capture;
 428
 429         int err;
 430
 431         const u32 channels = substream->runtime->channels;
 432         const u32 bytes_per_frame = channels * 3;
 433         const u32 period_size = substream->runtime->period_size;
 434         const u32 periods = substream->runtime->periods;
 435         const u32 period_bytes = period_size * bytes_per_frame;
 436
 437         dma_addr_t buf = substream->dma_buffer.addr;
 438         int i;
 439
 440         u32 needed, freed;
 441         u32 size_array[5];
 442
 443         for (i = 0; i != periods; ++i) {
 444                 u32 buffer_index = 0;
 445
 446                 err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed,
 447                                     size_array);
 448                 dev_dbg(chip->card->dev, "starting: needed %d, freed %d\n",
 449                             needed, freed);
 450
 451                 err = lx_buffer_give(chip, 0, is_capture, period_bytes,
 452                                      lower_32_bits(buf), upper_32_bits(buf),
 453                                      &buffer_index);
 454
 455                 dev_dbg(chip->card->dev, "starting: buffer index %x on 0x%lx (%d bytes)\n",
 456                             buffer_index, (unsigned long)buf, period_bytes);
 457                 buf += period_bytes;
 458         }
 459
 460         err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
 461         dev_dbg(chip->card->dev, "starting: needed %d, freed %d\n", needed, freed);
 462
 463         dev_dbg(chip->card->dev, "starting: starting stream\n");
 464         err = lx_stream_start(chip, 0, is_capture);
 465         if (err < 0)
 466                 dev_err(chip->card->dev, "couldn't start stream\n");
 467         else
 468                 lx_stream->status = LX_STREAM_STATUS_RUNNING;
 469
 470         lx_stream->frame_pos = 0;
 471 }
 472
 473 static void lx_trigger_stop(struct lx6464es *chip, struct lx_stream *lx_stream)
 474 {
 475         const unsigned int is_capture = lx_stream->is_capture;
 476         int err;
 477
 478         dev_dbg(chip->card->dev, "stopping: stopping stream\n");
 479         err = lx_stream_stop(chip, 0, is_capture);
 480         if (err < 0)
 481                 dev_err(chip->card->dev, "couldn't stop stream\n");
 482         else
 483                 lx_stream->status = LX_STREAM_STATUS_FREE;
 484
 485 }
 486
 487 static void lx_trigger_dispatch_stream(struct lx6464es *chip,
 488                                        struct lx_stream *lx_stream)
 489 {
 490         switch (lx_stream->status) {
 491         case LX_STREAM_STATUS_SCHEDULE_RUN:
 492                 lx_trigger_start(chip, lx_stream);
 493                 break;
 494
 495         case LX_STREAM_STATUS_SCHEDULE_STOP:
 496                 lx_trigger_stop(chip, lx_stream);
 497                 break;
 498
 499         default:
 500                 break;
 501         }
 502 }
 503
 504 static int lx_pcm_trigger_dispatch(struct lx6464es *chip,
 505                                    struct lx_stream *lx_stream, int cmd)
 506 {
 507         int err = 0;
 508
 509         mutex_lock(&chip->lock);
 510         switch (cmd) {
 511         case SNDRV_PCM_TRIGGER_START:
 512                 lx_stream->status = LX_STREAM_STATUS_SCHEDULE_RUN;
 513                 break;
 514
 515         case SNDRV_PCM_TRIGGER_STOP:
 516                 lx_stream->status = LX_STREAM_STATUS_SCHEDULE_STOP;
 517                 break;
 518
 519         default:
 520                 err = -EINVAL;
 521                 goto exit;
 522         }
 523
 524         lx_trigger_dispatch_stream(chip, &chip->capture_stream);
 525         lx_trigger_dispatch_stream(chip, &chip->playback_stream);
 526
 527 exit:
 528         mutex_unlock(&chip->lock);
 529         return err;
 530 }
 531
 532
 533 static int lx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 534 {
 535         struct lx6464es *chip = snd_pcm_substream_chip(substream);
 536         const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 537         struct lx_stream *stream = is_capture ? &chip->capture_stream :
 538                 &chip->playback_stream;
 539
 540         dev_dbg(chip->card->dev, "->lx_pcm_trigger\n");
 541
 542         return lx_pcm_trigger_dispatch(chip, stream, cmd);
 543 }
 544
 545 static int snd_lx6464es_free(struct lx6464es *chip)
 546 {
 547         dev_dbg(chip->card->dev, "->snd_lx6464es_free\n");
 548
 549         lx_irq_disable(chip);
 550
 551         if (chip->irq >= 0)
 552                 free_irq(chip->irq, chip);
 553
 554         iounmap(chip->port_dsp_bar);
 555         ioport_unmap(chip->port_plx_remapped);
 556
 557         pci_release_regions(chip->pci);
 558         pci_disable_device(chip->pci);
 559
 560         kfree(chip);
 561
 562         return 0;
 563 }
 564
 565 static int snd_lx6464es_dev_free(struct snd_device *device)
 566 {
 567         return snd_lx6464es_free(device->device_data);
 568 }
 569
 570 /* reset the dsp during initialization */
 571 static int lx_init_xilinx_reset(struct lx6464es *chip)
 572 {
 573         int i;
 574         u32 plx_reg = lx_plx_reg_read(chip, ePLX_CHIPSC);
 575
 576         dev_dbg(chip->card->dev, "->lx_init_xilinx_reset\n");
 577
 578         /* activate reset of xilinx */
 579         plx_reg &= ~CHIPSC_RESET_XILINX;
 580
 581         lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg);
 582         msleep(1);
 583
 584         lx_plx_reg_write(chip, ePLX_MBOX3, 0);
 585         msleep(1);
 586
 587         plx_reg |= CHIPSC_RESET_XILINX;
 588         lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg);
 589
 590         /* deactivate reset of xilinx */
 591         for (i = 0; i != 100; ++i) {
 592                 u32 reg_mbox3;
 593                 msleep(10);
 594                 reg_mbox3 = lx_plx_reg_read(chip, ePLX_MBOX3);
 595                 if (reg_mbox3) {
 596                         dev_dbg(chip->card->dev, "xilinx reset done\n");
 597                         dev_dbg(chip->card->dev, "xilinx took %d loops\n", i);
 598                         break;
 599                 }
 600         }
 601
 602         /* todo: add some error handling? */
 603
 604         /* clear mr */
 605         lx_dsp_reg_write(chip, eReg_CSM, 0);
 606
 607         /* le xilinx ES peut ne pas etre encore pret, on attend. */
 608         msleep(600);
 609
 610         return 0;
 611 }
 612
 613 static int lx_init_xilinx_test(struct lx6464es *chip)
 614 {
 615         u32 reg;
 616
 617         dev_dbg(chip->card->dev, "->lx_init_xilinx_test\n");
 618
 619         /* TEST if we have access to Xilinx/MicroBlaze */
 620         lx_dsp_reg_write(chip, eReg_CSM, 0);
 621
 622         reg = lx_dsp_reg_read(chip, eReg_CSM);
 623
 624         if (reg) {
 625                 dev_err(chip->card->dev, "Problem: Reg_CSM %x.\n", reg);
 626
 627                 /* PCI9056_SPACE0_REMAP */
 628                 lx_plx_reg_write(chip, ePLX_PCICR, 1);
 629
 630                 reg = lx_dsp_reg_read(chip, eReg_CSM);
 631                 if (reg) {
 632                         dev_err(chip->card->dev, "Error: Reg_CSM %x.\n", reg);
 633                         return -EAGAIN; /* seems to be appropriate */
 634                 }
 635         }
 636
 637         dev_dbg(chip->card->dev, "Xilinx/MicroBlaze access test successful\n");
 638
 639         return 0;
 640 }
 641
 642 /* initialize ethersound */
 643 static int lx_init_ethersound_config(struct lx6464es *chip)
 644 {
 645         int i;
 646         u32 orig_conf_es = lx_dsp_reg_read(chip, eReg_CONFES);
 647
 648         /* configure 64 io channels */
 649         u32 conf_es = (orig_conf_es & CONFES_READ_PART_MASK) |
 650                 (64 << IOCR_INPUTS_OFFSET) |
 651                 (64 << IOCR_OUTPUTS_OFFSET) |
 652                 (FREQ_RATIO_SINGLE_MODE << FREQ_RATIO_OFFSET);
 653
 654         dev_dbg(chip->card->dev, "->lx_init_ethersound\n");
 655
 656         chip->freq_ratio = FREQ_RATIO_SINGLE_MODE;
 657
 658         /*
 659          * write it to the card !
 660          * this actually kicks the ES xilinx, the first time since poweron.
 661          * the MAC address in the Reg_ADMACESMSB Reg_ADMACESLSB registers
 662          * is not ready before this is done, and the bit 2 in Reg_CSES is set.
 663          * */
 664         lx_dsp_reg_write(chip, eReg_CONFES, conf_es);
 665
 666         for (i = 0; i != 1000; ++i) {
 667                 if (lx_dsp_reg_read(chip, eReg_CSES) & 4) {
 668                         dev_dbg(chip->card->dev, "ethersound initialized after %dms\n",
 669                                    i);
 670                         goto ethersound_initialized;
 671                 }
 672                 msleep(1);
 673         }
 674         dev_warn(chip->card->dev,
 675                    "ethersound could not be initialized after %dms\n", i);
 676         return -ETIMEDOUT;
 677
 678  ethersound_initialized:
 679         dev_dbg(chip->card->dev, "ethersound initialized\n");
 680         return 0;
 681 }
 682
 683 static int lx_init_get_version_features(struct lx6464es *chip)
 684 {
 685         u32 dsp_version;
 686
 687         int err;
 688
 689         dev_dbg(chip->card->dev, "->lx_init_get_version_features\n");
 690
 691         err = lx_dsp_get_version(chip, &dsp_version);
 692
 693         if (err == 0) {
 694                 u32 freq;
 695
 696                 dev_info(chip->card->dev, "DSP version: V%02d.%02d #%d\n",
 697                            (dsp_version>>16) & 0xff, (dsp_version>>8) & 0xff,
 698                            dsp_version & 0xff);
 699
 700                 /* later: what firmware version do we expect? */
 701
 702                 /* retrieve Play/Rec features */
 703                 /* done here because we may have to handle alternate
 704                  * DSP files. */
 705                 /* later */
 706
 707                 /* init the EtherSound sample rate */
 708                 err = lx_dsp_get_clock_frequency(chip, &freq);
 709                 if (err == 0)
 710                         chip->board_sample_rate = freq;
 711                 dev_dbg(chip->card->dev, "actual clock frequency %d\n", freq);
 712         } else {
 713                 dev_err(chip->card->dev, "DSP corrupted \n");
 714                 err = -EAGAIN;
 715         }
 716
 717         return err;
 718 }
 719
 720 static int lx_set_granularity(struct lx6464es *chip, u32 gran)
 721 {
 722         int err = 0;
 723         u32 snapped_gran = MICROBLAZE_IBL_MIN;
 724
 725         dev_dbg(chip->card->dev, "->lx_set_granularity\n");
 726
 727         /* blocksize is a power of 2 */
 728         while ((snapped_gran < gran) &&
 729                (snapped_gran < MICROBLAZE_IBL_MAX)) {
 730                 snapped_gran *= 2;
 731         }
 732
 733         if (snapped_gran == chip->pcm_granularity)
 734                 return 0;
 735
 736         err = lx_dsp_set_granularity(chip, snapped_gran);
 737         if (err < 0) {
 738                 dev_warn(chip->card->dev, "could not set granularity\n");
 739                 err = -EAGAIN;
 740         }
 741
 742         if (snapped_gran != gran)
 743                 dev_err(chip->card->dev, "snapped blocksize to %d\n", snapped_gran);
 744
 745         dev_dbg(chip->card->dev, "set blocksize on board %d\n", snapped_gran);
 746         chip->pcm_granularity = snapped_gran;
 747
 748         return err;
 749 }
 750
 751 /* initialize and test the xilinx dsp chip */
 752 static int lx_init_dsp(struct lx6464es *chip)
 753 {
 754         int err;
 755         int i;
 756
 757         dev_dbg(chip->card->dev, "->lx_init_dsp\n");
 758
 759         dev_dbg(chip->card->dev, "initialize board\n");
 760         err = lx_init_xilinx_reset(chip);
 761         if (err)
 762                 return err;
 763
 764         dev_dbg(chip->card->dev, "testing board\n");
 765         err = lx_init_xilinx_test(chip);
 766         if (err)
 767                 return err;
 768
 769         dev_dbg(chip->card->dev, "initialize ethersound configuration\n");
 770         err = lx_init_ethersound_config(chip);
 771         if (err)
 772                 return err;
 773
 774         lx_irq_enable(chip);
 775
 776         /** \todo the mac address should be ready by not, but it isn't,
 777          *  so we wait for it */
 778         for (i = 0; i != 1000; ++i) {
 779                 err = lx_dsp_get_mac(chip);
 780                 if (err)
 781                         return err;
 782                 if (chip->mac_address[0] || chip->mac_address[1] || chip->mac_address[2] ||
 783                     chip->mac_address[3] || chip->mac_address[4] || chip->mac_address[5])
 784                         goto mac_ready;
 785                 msleep(1);
 786         }
 787         return -ETIMEDOUT;
 788
 789 mac_ready:
 790         dev_dbg(chip->card->dev, "mac address ready read after: %dms\n", i);
 791         dev_info(chip->card->dev,
 792                  "mac address: %02X.%02X.%02X.%02X.%02X.%02X\n",
 793                    chip->mac_address[0], chip->mac_address[1], chip->mac_address[2],
 794                    chip->mac_address[3], chip->mac_address[4], chip->mac_address[5]);
 795
 796         err = lx_init_get_version_features(chip);
 797         if (err)
 798                 return err;
 799
 800         lx_set_granularity(chip, MICROBLAZE_IBL_DEFAULT);
 801
 802         chip->playback_mute = 0;
 803
 804         return err;
 805 }
 806
 807 static const struct snd_pcm_ops lx_ops_playback = {
 808         .open      = lx_pcm_open,
 809         .close     = lx_pcm_close,
 810         .ioctl     = snd_pcm_lib_ioctl,
 811         .prepare   = lx_pcm_prepare,
 812         .hw_params = lx_pcm_hw_params_playback,
 813         .hw_free   = lx_pcm_hw_free,
 814         .trigger   = lx_pcm_trigger,
 815         .pointer   = lx_pcm_stream_pointer,
 816 };
 817
 818 static const struct snd_pcm_ops lx_ops_capture = {
 819         .open      = lx_pcm_open,
 820         .close     = lx_pcm_close,
 821         .ioctl     = snd_pcm_lib_ioctl,
 822         .prepare   = lx_pcm_prepare,
 823         .hw_params = lx_pcm_hw_params_capture,
 824         .hw_free   = lx_pcm_hw_free,
 825         .trigger   = lx_pcm_trigger,
 826         .pointer   = lx_pcm_stream_pointer,
 827 };
 828
 829 static int lx_pcm_create(struct lx6464es *chip)
 830 {
 831         int err;
 832         struct snd_pcm *pcm;
 833
 834         u32 size = 64 *              /* channels */
 835                 3 *                  /* 24 bit samples */
 836                 MAX_STREAM_BUFFER *  /* periods */
 837                 MICROBLAZE_IBL_MAX * /* frames per period */
 838                 2;                   /* duplex */
 839
 840         size = PAGE_ALIGN(size);
 841
 842         /* hardcoded device name & channel count */
 843         err = snd_pcm_new(chip->card, (char *)card_name, 0,
 844                           1, 1, &pcm);
 845         if (err < 0)
 846                 return err;
 847
 848         pcm->private_data = chip;
 849
 850         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &lx_ops_playback);
 851         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &lx_ops_capture);
 852
 853         pcm->info_flags = 0;
 854         pcm->nonatomic = true;
 855         strcpy(pcm->name, card_name);
 856
 857         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 858                                                     snd_dma_pci_data(chip->pci),
 859                                                     size, size);
 860         if (err < 0)
 861                 return err;
 862
 863         chip->pcm = pcm;
 864         chip->capture_stream.is_capture = 1;
 865
 866         return 0;
 867 }
 868
 869 static int lx_control_playback_info(struct snd_kcontrol *kcontrol,
 870                                     struct snd_ctl_elem_info *uinfo)
 871 {
 872         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 873         uinfo->count = 1;
 874         uinfo->value.integer.min = 0;
 875         uinfo->value.integer.max = 1;
 876         return 0;
 877 }
 878
 879 static int lx_control_playback_get(struct snd_kcontrol *kcontrol,
 880                                    struct snd_ctl_elem_value *ucontrol)
 881 {
 882         struct lx6464es *chip = snd_kcontrol_chip(kcontrol);
 883         ucontrol->value.integer.value[0] = chip->playback_mute;
 884         return 0;
 885 }
 886
 887 static int lx_control_playback_put(struct snd_kcontrol *kcontrol,
 888                                    struct snd_ctl_elem_value *ucontrol)
 889 {
 890         struct lx6464es *chip = snd_kcontrol_chip(kcontrol);
 891         int changed = 0;
 892         int current_value = chip->playback_mute;
 893
 894         if (current_value != ucontrol->value.integer.value[0]) {
 895                 lx_level_unmute(chip, 0, !current_value);
 896                 chip->playback_mute = !current_value;
 897                 changed = 1;
 898         }
 899         return changed;
 900 }
 901
 902 static const struct snd_kcontrol_new lx_control_playback_switch = {
 903         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 904         .name = "PCM Playback Switch",
 905         .index = 0,
 906         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 907         .private_value = 0,
 908         .info = lx_control_playback_info,
 909         .get = lx_control_playback_get,
 910         .put = lx_control_playback_put
 911 };
 912
 913
 914
 915 static void lx_proc_levels_read(struct snd_info_entry *entry,
 916                                 struct snd_info_buffer *buffer)
 917 {
 918         u32 levels[64];
 919         int err;
 920         int i, j;
 921         struct lx6464es *chip = entry->private_data;
 922
 923         snd_iprintf(buffer, "capture levels:\n");
 924         err = lx_level_peaks(chip, 1, 64, levels);
 925         if (err < 0)
 926                 return;
 927
 928         for (i = 0; i != 8; ++i) {
 929                 for (j = 0; j != 8; ++j)
 930                         snd_iprintf(buffer, "%08x ", levels[i*8+j]);
 931                 snd_iprintf(buffer, "\n");
 932         }
 933
 934         snd_iprintf(buffer, "\nplayback levels:\n");
 935
 936         err = lx_level_peaks(chip, 0, 64, levels);
 937         if (err < 0)
 938                 return;
 939
 940         for (i = 0; i != 8; ++i) {
 941                 for (j = 0; j != 8; ++j)
 942                         snd_iprintf(buffer, "%08x ", levels[i*8+j]);
 943                 snd_iprintf(buffer, "\n");
 944         }
 945
 946         snd_iprintf(buffer, "\n");
 947 }
 948
 949 static int lx_proc_create(struct snd_card *card, struct lx6464es *chip)
 950 {
 951         struct snd_info_entry *entry;
 952         int err = snd_card_proc_new(card, "levels", &entry);
 953         if (err < 0)
 954                 return err;
 955
 956         snd_info_set_text_ops(entry, chip, lx_proc_levels_read);
 957         return 0;
 958 }
 959
 960
 961 static int snd_lx6464es_create(struct snd_card *card,
 962                                struct pci_dev *pci,
 963                                struct lx6464es **rchip)
 964 {
 965         struct lx6464es *chip;
 966         int err;
 967
 968         static struct snd_device_ops ops = {
 969                 .dev_free = snd_lx6464es_dev_free,
 970         };
 971
 972         dev_dbg(card->dev, "->snd_lx6464es_create\n");
 973
 974         *rchip = NULL;
 975
 976         /* enable PCI device */
 977         err = pci_enable_device(pci);
 978         if (err < 0)
 979                 return err;
 980
 981         pci_set_master(pci);
 982
 983         /* check if we can restrict PCI DMA transfers to 32 bits */
 984         err = dma_set_mask(&pci->dev, DMA_BIT_MASK(32));
 985         if (err < 0) {
 986                 dev_err(card->dev,
 987                         "architecture does not support 32bit PCI busmaster DMA\n");
 988                 pci_disable_device(pci);
 989                 return -ENXIO;
 990         }
 991
 992         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 993         if (chip == NULL) {
 994                 err = -ENOMEM;
 995                 goto alloc_failed;
 996         }
 997
 998         chip->card = card;
 999         chip->pci = pci;
1000         chip->irq = -1;
1001
1002         /* initialize synchronization structs */
1003         mutex_init(&chip->lock);
1004         mutex_init(&chip->msg_lock);
1005         mutex_init(&chip->setup_mutex);
1006
1007         /* request resources */
1008         err = pci_request_regions(pci, card_name);
1009         if (err < 0)
1010                 goto request_regions_failed;
1011
1012         /* plx port */
1013         chip->port_plx = pci_resource_start(pci, 1);
1014         chip->port_plx_remapped = ioport_map(chip->port_plx,
1015                                              pci_resource_len(pci, 1));
1016
1017         /* dsp port */
1018         chip->port_dsp_bar = pci_ioremap_bar(pci, 2);
1019
1020         err = request_threaded_irq(pci->irq, lx_interrupt, lx_threaded_irq,
1021                                    IRQF_SHARED, KBUILD_MODNAME, chip);
1022         if (err) {
1023                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1024                 goto request_irq_failed;
1025         }
1026         chip->irq = pci->irq;
1027
1028         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
1029         if (err < 0)
1030                 goto device_new_failed;
1031
1032         err = lx_init_dsp(chip);
1033         if (err < 0) {
1034                 dev_err(card->dev, "error during DSP initialization\n");
1035                 return err;
1036         }
1037
1038         err = lx_pcm_create(chip);
1039         if (err < 0)
1040                 return err;
1041
1042         err = lx_proc_create(card, chip);
1043         if (err < 0)
1044                 return err;
1045
1046         err = snd_ctl_add(card, snd_ctl_new1(&lx_control_playback_switch,
1047                                              chip));
1048         if (err < 0)
1049                 return err;
1050
1051         *rchip = chip;
1052         return 0;
1053
1054 device_new_failed:
1055         free_irq(pci->irq, chip);
1056
1057 request_irq_failed:
1058         pci_release_regions(pci);
1059
1060 request_regions_failed:
1061         kfree(chip);
1062
1063 alloc_failed:
1064         pci_disable_device(pci);
1065
1066         return err;
1067 }
1068
1069 static int snd_lx6464es_probe(struct pci_dev *pci,
1070                               const struct pci_device_id *pci_id)
1071 {
1072         static int dev;
1073         struct snd_card *card;
1074         struct lx6464es *chip;
1075         int err;
1076
1077         dev_dbg(&pci->dev, "->snd_lx6464es_probe\n");
1078
1079         if (dev >= SNDRV_CARDS)
1080                 return -ENODEV;
1081         if (!enable[dev]) {
1082                 dev++;
1083                 return -ENOENT;
1084         }
1085
1086         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
1087                            0, &card);
1088         if (err < 0)
1089                 return err;
1090
1091         err = snd_lx6464es_create(card, pci, &chip);
1092         if (err < 0) {
1093                 dev_err(card->dev, "error during snd_lx6464es_create\n");
1094                 goto out_free;
1095         }
1096
1097         strcpy(card->driver, "LX6464ES");
1098         sprintf(card->id, "LX6464ES_%02X%02X%02X",
1099                 chip->mac_address[3], chip->mac_address[4], chip->mac_address[5]);
1100
1101         sprintf(card->shortname, "LX6464ES %02X.%02X.%02X.%02X.%02X.%02X",
1102                 chip->mac_address[0], chip->mac_address[1], chip->mac_address[2],
1103                 chip->mac_address[3], chip->mac_address[4], chip->mac_address[5]);
1104
1105         sprintf(card->longname, "%s at 0x%lx, 0x%p, irq %i",
1106                 card->shortname, chip->port_plx,
1107                 chip->port_dsp_bar, chip->irq);
1108
1109         err = snd_card_register(card);
1110         if (err < 0)
1111                 goto out_free;
1112
1113         dev_dbg(chip->card->dev, "initialization successful\n");
1114         pci_set_drvdata(pci, card);
1115         dev++;
1116         return 0;
1117
1118 out_free:
1119         snd_card_free(card);
1120         return err;
1121
1122 }
1123
1124 static void snd_lx6464es_remove(struct pci_dev *pci)
1125 {
1126         snd_card_free(pci_get_drvdata(pci));
1127 }
1128
1129
1130 static struct pci_driver lx6464es_driver = {
1131         .name =     KBUILD_MODNAME,
1132         .id_table = snd_lx6464es_ids,
1133         .probe =    snd_lx6464es_probe,
1134         .remove = snd_lx6464es_remove,
1135 };
1136
1137 module_pci_driver(lx6464es_driver);